THE EFFECTS OF POTASSIUM AND SODIUM CONTENTS IN THE CERAMIC SUBSTRATE ON THE LOAD LIVES OF FILM RESISTORS
Abstract
Several film-resistor materials and the general requirements for the surface of the substrate are described. The insulation resistance of several substrates was measured. The effects of various substrates upon the load lives of three kinds of film resistors were investigated. It has been pointed out from the tests of the metal film resistor that the initial changes of the resistance were semipermanent on DC load and the electrochemical corrosion of the films was gradual and relatively long. This effect had much to do with the test conditions and could be slowed down by derating. The different of Na(+) and K(+) in the substrate showed quite different effects. This paper presents some possible methods for improving the DC aging performance of film resistors. By comparing the load lives of the newer and older substrates, it is considered to be very effective to add alkali-earth metal oxides as the flux for a ceramic substrate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1967
- Accession Number
- AD0670901
Entities
People
- Yu-chun Kao
- Yu-ken Wu
Organizations
- National Air and Space Intelligence Center